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        <header><h2>F#入门</h3></header>
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            <h3>第四节 词法闭包</h3>
            <p>lambda表达式可以创建词法闭包...（文章正文)</p>
            <aside><h3>名词解释</h3></aside>
            <h4>F#</h4>
            <p>&nbsp;&nbsp;&nbsp;&nbsp;F#.Net2010中引入的新型函数编程语言</p>
            <h4>词法闭包</h4>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;词法闭包是指，将创建lambda表达式时的环境保存起来...（详细解释)</p>
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